Figures

Claim 1

IN A ROTARY MECHANISM FOR HANDLING FLUIDS, A CASING INCLUDING AN OUTER GEAR AND AN INNER GEAR, SAID OUTER GEAR SURROUNDING AND ECCENTRIC TO SAID INNER GEAR, A SHAFT MEMBER SUPPORTING SAID INNER GEAR, A SHAFT AND AT LEAST ONE END PLATE SUPPORTING SAID OUTER GEAR, SAID GEARS HAVING INTERMESHING TEETH FORMING CHAMBERS BETWEEN THEM WHICH OPEN AND CLOSE DURING ROTATION, SAID TEETH HAVING DRIVING CONTOURS CHARACTERIZED BY CURVES ON THE TEETH OF EACH GEAR DESCRIBED OR OUTLINED BY THE TEETH OF THE OTHER GEAR AT RELATIVELY STEADY ANGULAR SPEEDS, SAID DRIVING CONTOURS MAINTAINING FLUID TIGHT CONTACTS WITH EACH OTHER IN THE FULL MESH REGION BETWEEN OPENING AND CLOSING CHAMBERS AND TRAVELLING TOOTH ENGAGEMENTS IN THE OPEN MESH REGIONS, SAID DRIVING CONTOURS HAVING INSTANT CENTERS OF CURVATURE FAR ENOUGH OUTSIDE OF THE RATIO OR PITCH CIRCLES TO MAINTAIN SAID CONTACTS AND ENGAGEMENTS, INLET AND OUTLET PORTS, OPENINGS IN THE BOTTOMS OF THE TOOTH SPACES OF AT LEAST ONE GEAR TO CONNECT SAID CHAMBERS DIRECTLY TO SAID PORTS, SAID OPENINGS BEING LONG ENOUGH AXIALLY AND WIDE ENOUGH CIRCUMFERENTIALLY FOR EFFICIENT INGRESS AND EGRESS OF FLUIDS ENTERING AND LEAVING SAID CHAMBERS, AT LEAST ONE FULL MESH ABUTMENT AND AT LEAST ONE OPEN MESH ABUTMENT BETWEEN SAID PORTS, SAID FULL MESH ABUTMENT BEING AT LEAST HALF AS WIDE CIRCUMFERENTIALLY AS SAID OPENINGS AND AT LEAST AS LONG AXIALLY AS SAID OPENINGS, HAVING TIPS OF THE TEETH OF AT LEAST ONE GEAR MODIFIED IN SHAPE FROM THAT OF THE TRUE OUTLINED OR DESCRIBED CURVE BY BEING REDUCED IN HEIGHT AND SHAPED TO HAVE A CLOSE RUNNING FIT WITH SAID FULL MESH ABUTMENT AND AT THE SAME TIME EXPEL ALL FLUID FROM THE CLOSING CHAMBERS, SAID OPEN MESH ABUTMENT BEING AT LEAST AS WIDE CIRCUMFERENTIALLY AS SAID OPENINGS AND AT LEAST AS LONG AXIALLY AS SAID OPENINGS TO PREVENT FLUID FROM ESCAPING FROM ONE OF SAID PORTS TO THE OTHER OF SAID PORTS, WHEREBY SAID DRIVING CONTOURS, SAID MODIFIED TOOTH TIPS AND SAID ABUTMENT AT FULL MESH COOPERATE TO PERMIT EXIT OF FLUID FROM THE CLOSING GEAR CHAMBERS AS THEY ROTATE THROUGH THE FULL MESH REGION WITHOUT THE JAMMING OR TRAPPING OF FLUID AND CONSEQUENT LOSS OF POWER WHILE SAID MODIFIED TOOTH TIPS ALSO PROVIDE AN EMPTY CRESENT SHAPED SPACE AT OPEN MESH OF NO TOOTH ENGAGEMENT.